Question

E. Give reasons for the following.
1. Only few substances can be used as natural indicators.
2. Washing soda is an effective component of detergents not baking soda.
3. Calamine solution is applied on the skin when an ant bites.
4. Neutral solutions do not show any effect on litmus paper.
5. Turmeric stain on white shirt turns to red when it is washed with soap.​

Answer 1

Answer:

(a) We take an antacid such as milk of magnesia to neutalises the excessive acid released in stomach.

(b) Ant injects an acidic liquid(Formic acid) into the skin on biting which causes inflammation, to the skin. The effect of the acid can be neutralised by rubbing. Calamine solution which contains zinc carbonate which is very weak base and causes no harm to the skin.

(c) The waste of factories contain acids. If acids are disposed off in the water body, the acids will harm the organisms. So factory wastes are neutralised by adding basic susbtances.

Answer 2

Answer:

here is your answer

Explanation: